Well-casing shoe.



R. U. BAKER.

WELL CASING SHOE.

APPLICATION rump NOV. 11111 2.

1078530, Patented Nov. .11, 1913.

REUBEN Cl. BAKElR, 0F GOALINGA, CALIFURNIA, ASSIG-NOR 'liO BAKER CASING SHOE 66:, A. CORPORATION OF"CKIIIFORNHL wists-enema anon.

Specification of Letters Patent.

Patented Nov. ii, isle,

To all whom it may concern."

Be it lmownthat l, REUBEN (I. BAKER, a citizen of the United States, residing at Coalinga, inthe county of Fresno and State of California, have invented a new and useiul Well-Casing Shoe, of which the followin%is a specification.

he device herein disclosed is adapted to be employed for drilling Artesian and oil wells and particularl to be employed for reaming out a small ore, so that the same may receive the well tubing.

The invention aims to provide a cutter which will not clog, the material detached by cutting elements being permitted. to drop between the openings existing between the cutting elements or a lower set.

A further object of the invention is to provide a tool of the class mentioned, in which the entire cutting strain will not be carried by a single series of cutters.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being" understood that changes in the precise embodiment of invention can be made within the scope. of what is claimed withoutdeparting from the spirit of the invention.

in the drawing:-Figure 1 shows the invention in side elevation; Fig. 2 is a longitudinal section; and Fig. 3 is a bottom plan.

The cutter herein disclosed comprises a cylindrical shell 1 adapted to be connected with a driving member in any suitable manner. In the present instance, the shell is internally threaded, intermediate its ends as indicated at 3, the wall of the shell 1 being thickened adjacent the lower end of the shell, as shown. at l, to define a shoulder flared slightly as shown at 2, to

necessary clearance.

at the lower end of the threaded portion 3, the shoulder 5 constituting an abutment for the driving member. Adjacent its lower 5 end and upon its outer surface, the shell 1 is provide the Formed upon the lower end. of the shell I. are a plurality of cutters 6. Above the cutters 6 are located other cutters 7, and above the cutters *4" are located other cutters 8. The several cutters are disposed in circles. The diameter of the circle in which the cutters 7 are disposed, is greater than the diameter of the circle in which the cutters 6 are disposed, and less than the diameter oi? the circle in which the cutters 8 are disposed. The cutters lie above the openin s 9 between the cutters 6. The cutters ,however, overhang the cutters 6, partially, circumferentially of the shell 1. The cutters 8, however, are located directely above the openings 10' which exist between the cutters The construction is such that the material removed by the cutters 7 will drop downwardly into the openings 9 between the out ters 6, the material removed by the cutters 8 passing downwardly through the open ings 10 which exist between the cutters 7.

()wing to this fact, and to the further tact that the several sets of cutters are disposed in circles, the diameters of which increase toward the upper end of the .tool, the tool will clear itself readily, iii-operation, and will not clog.

Further, it is to be noted,

the entire boring operation is not confined 1. A well boring tool provided at its lower end with superposed sets of s aced cutters, the cutters of each upper set eing located above the openings between the cutters of the next lower set.

2. A well boring tool provided at its lower mveeee emi with superposed sets of spaced cutters Intestimony that I claim the foregoing the cutters of each upper set being located as my own, 1 have hereto afiixe i my signaabove the openings between the cutters of ture in the presence of two Witnesses.

the next lower set, the cutters of each set REUBEN C. BAKER. being disposed in a circle, the diameters of 1 -Wit lessee: the circles increasing in the direction of the Z. G. PEELPB,

top of the tool. H. R. Gmzmiz. 

